Ubuntu Security Notice 3414-2 - USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for CVE-2017-9375 was incomplete and caused a regression in the USB xHCI controller emulation support. This update fixes the problem. Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control. A guest attacker could use this issue to elevate privileges inside the guest. Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources or crash, resulting in a denial of service. Various other issues were also addressed.

Red Hat Security Advisory 2017-2771-01 - GNU Emacs is a powerful, customizable, self-documenting text editor. It provides special code editing features, a scripting language, and the capability to read e-mail and news. Security Fix: A command injection flaw within the Emacs "enriched mode" handling has been discovered. By tricking an unsuspecting user into opening a specially crafted file using Emacs, a remote attacker could exploit this flaw to execute arbitrary commands with the privileges of the Emacs user.

Red Hat Security Advisory 2017-2770-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix: A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation.